Building custom module Ansible - ansible

Question

I am trying to build a custom module for our private cloud Infrastructure.
I followed this doc http://docs.ansible.com/ansible/latest/dev_guide/developing_modules_general.html
I created a my_module.py module file.
When I hit ansible-playbook playbook/my_module.yml
Response:
PLAY [Create, Update, Delete VM] *********************************************************************************************************
TASK [Gathering Facts] ************************************************************************************************************************
ok: [localhost]
TASK [VM create] *************************************************************************************************************************
changed: [localhost]
TASK [dump test output] ***********************************************************************************************************************
ok: [localhost] => {
"msg": {
"changed": true,
"failed": false,
"message": "goodbye",
"original_message": "pcp_vm_ansible"
}
}
PLAY RECAP ************************************************************************************************************************************
localhost : ok=3 changed=1 unreachable=0 failed=0
Which means it is working fine as expected.
Module.py
from ansible.module_utils.basic import AnsibleModule
def run_module():
module_args = dict(
name=dict(type='str', required=True),
new=dict(type='bool', required=False, default=False)
)
result = dict(
changed=False,
original_message='',
message=''
)
module = AnsibleModule(
argument_spec=module_args,
supports_check_mode=True
)
if module.check_mode:
return result
result['original_message'] = module.params['name']
result['message'] = 'goodbye'
if module.params['new']:
result['changed'] = True
if module.params['name'] == 'fail me':
module.fail_json(msg='You requested this to fail', **result)
module.exit_json(**result)
def main():
print("================== Main Called =======================")
run_module()
if __name__ == '__main__':
main()
I am trying to print logs to visualize my input data using print() or even logging.
print("================== Main Called =======================")
But nothing is getting printed to console.

Answer 1

As per Conventions, Best Practices, and Pitfalls, "Modules must output valid JSON only. The top level return type must be a hash (dictionary) although they can be nested. Lists or simple scalar values are not supported, though they can be trivially contained inside a dictionary."
Effectively, the core runtime only communicates with the module via JSON and the core runtime controls stdout so the standard print statements from the module are suppressed. If you want or need more information out of the execution runtime then I suggest a Callback Plugin.